If you're looking to have the DHCP/Router functions disabled in order to use your own third party router, you should be able to get the rogers tech support to turn DHCP off for you from their end.

It seems to me that Rogers is trying to lock out their customers from router settings. My issue is that they usually use standardized logins which make it too easy for any script kiddie to hack and I won't have the option to change the password like this.